Metal tapping tool



' Ncv.16,1937. HRAFFL'ES 2,099,246

METAL TAPPING TOOL Filed March 27, 1957 PatentedNov. l6, I

v V I aosazief V METALTAPPING TOOL Harry' Rafflea Ch icago, I11. I

Application March 27, 1937, Serial No. 133,352

1 Claim. (01. 145-61), f

part of toy metal tapping'sets', which sets com' prise small plates of thin sheet brass or other suitable material on which are outlined designs i m whichmay be followed by tapping the outline of. the designs withjvarious tools as desired, to puncture or indent the material and thereby.

provide a suitable artistic effect. Thin blocks.

of wood or other material are provided on which the sheets of brass may be mounted, and ajsuitable hammer is also furnished with the set, to-

gether with a plurality of tool shanks and an interchangeable protective captherefor.

The tapping tools ordinarilyused causecon- It is therefore an object of the present invention to provide a set of tool shanks and an inter? changeable protective cap therefor in which the 7. noise of tapping is largely eliminated and in "which the shock of the hammer blow is not transmitted to the hand of the user and therefore does not tire the hand.

These sets are ordinarily used. small chi1-,

30 dren, andit is important to prevent injury to the hands of the user. It is therefore another object of the invention to provide a protective 7 cap of comparatively large size relative to the tool and so constructed that the hammer will 3 ordinarily not slip on the tool head.

A further object is the provision of a peculiar type of protective cap for small tool shanks in which asuitable sound absorbing cushion is provided for the striking end of the protective cap,

4 and alsoin which the shanks do not come into striking engagement with the metal of the protective cap but are protected therefrom by suit able shock absorbing'and noise preventing means.

, A further object is the provision of a device of the character described which is of fewfparts,

cheap to manufacture, efficient in use, and which will not easily get out of order. I

Further objects will be apparent from the 50 specification and the appended claim.

In the drawing:

. Figure 1 is a full-sized side elevation of the cap and one of the interchangeable tool shanks.

I associated therewith, the shank b v55 with a so-called chisel point;- 7

eing provided siderable disagreeablelnoise which it is desirable to eliminate, also, they tire the hand of the user.

. shanks.

Fig; 2 is an enlarged axial sectional through the cap illustrated in Fig. 1; I

Fig. 3 is an enlarged View of one'of the interchange'able'shanks 'havinga comparatively sharp I view point; and

Fig. 4 illustrates one of the wooden blocks videdwitha thin sheet of metal thereon, on which is outlined a suitable design to be tapped.

Referring to the drawing in detail,' the embodiment illustrated comprises a cap portion l and'a shank 2 telescopically mounted thereon.

indicated ate, and provided with a depending tapered portion 5 which is only slightly larger at its lower'end than the-shank to be inserted therein. 'The upperface of I the cap is provided with a shallow large diameter counterbore 6, and a comparatively thick plug I of rubber or'similar resilient material is inserted in the bore 6 and preferably overlaps the upper surface of the base 4to provide a large thick striking suri UNISTATES PATENT OFFICE} 1 '7 which is furnished With the tapping set and pro- The cap' comprises a base portion 3 which is preferably greatly enlarged at its upper end,'as

face for the hammer, which, as previously mentioned, is furnished with the tapping set.

The cap is also provided with a small diameteraxial bore 8 in its opposite end, which bore a is of sufiicient diameter to provide a sliding fit over the shanks 2 and2 or other interchange able shanks which may be provided, whereby the cap may easily be retained on the shanks, although the shanks are freely movable in the bore 8 when the cap is struck with the hammer. The elongated bore 8 preferably extends to a point closely adjacent the counterbore 6 to provide a thin partition 9 therebetween. A snugly fitting plug It of rubber or similar material having shock absorbing and noise preventing characteristics is snugly pressed into the bore 8 and adjacent the partition Ill sothat when any of the shanks are telescoped into the cap the blunt. end of the shank will be separated from partition 9 by the plug [0.

As previouslystated, any number of shanks may be provided in accordance with the requirements ofthe particular toy set, and the. cap is adapted to' interchangeably accommodate any of the ous' types of working ends or points,-such as in-{ dicated at H and I2. Also,'a plurality of wooden,

blocks I3, together with a supply of metal plates" l4,'having suitable designs thereon, may be prosired portion of the design, and the cap istele- The shanks may be provided with varia scoped thereon. The tool is then used by tapping on the rubber pad I of the cap with the hammer to perforate or indent the design. When one portion of the design is completed, any other suitable shank included with the set may be used in connection with the cap on other portions of the design.

It will be apparent that the invention provides a device which is substantially shockand noiseproof and which provides maximum safety and efiiciency in use,

The tools are used by gripping the shank below the cap and the present invention provides a device in which the comparatively heavy cap is resiliently separated from the shank to prevent tiring the hand of the user by the transmission of the shock of impact of any metal part thereto, and also in which the hammer blow is suit-1 ably cushioned.

The cap is comparatively quite heavy in order that its momentum. when struck by the hammer will be transmitted to the shank through the resilient plug H1. By this means no shock of any metallic impact is ever applied to the shank.

Patent is:

A tool of the character described comprising the combination of a tool-shank with a working end, the other end being blunt, a protective cap for said'blunt end functioning as a blow-receiving member therefor, said cap being provided with a bore of such diameter that the blunt end of the shank may freely fit and slide thereinto,

a rubber plug in said bore at the inner end thereof, and a rubber bumper'on said cap.

HARRY RAFFLESL 

